48-Hour Frizz Control, Free of Heavy Silicones. The new standard of smooth has arrived. Ordinary smoothing shampoos can use harsh sulfates to cleanse hair, and have silicones that coat and weigh hair down. Free of harsh sulfates and heavy silicones, the EverSleek Sulfate-Free Smoothing System gently cleanses, and uses natural oils for weightless 48-Hour frizz control. EverSleek combines natural Argan, Sunflower, and Olive oils to penetrate and smooth hair, so that it stays weightlessly sleek through any weather.